Hi Pilou,

> From dwg and dxf each Circles are converted in 24 segments!

In this case it's only being converted into just 9 segments - that's because that conversion tool only makes generic "spline" entities in the DXF file, it doesn't try to make special entities like a line or circle, it just puts everything as a NURBS curve.

And then it looks like SketchUp just decides to break any generic spline entities up into just 9 segments even if that is very rough.

- Michael